Picker lag and pin



Nov. 4, 1941. c, D ETAL 2,261,452

PICKER LAG AND PIN Filed Oct. 3, 1939 INVENTORS ROBERT 63 R550 mm AA WRE/VCf 50 (K LUczMe/n. 6B. LUJJZM.

ATTORNEY.

Patented Nov. 4,

:PICKER LAG AND1PIN" I RobertfG Ree'd, Queens. vmtgg jg,new;

' renc'eBock, Newark, N. J assjgnor sjto William Crabb"& Company, Newark-N. 1, a corporation 2:: Application October 3, 1939,,jsn nazemcz' 5 2Claims. (on-19 9? with a plurality of protruding pins or teeth adapted to cause disintegration of the material fed thereagainst, the object being to open and pull apart the stock with the least possible cuttingand hence shortening-of the salvaged fibers.

The present invention has as an object to provide a laminated lag having interengaged lateral edges, each lamination or plate being independently produced from strong, tough sheet metal, as rolled steel, having rows of perforations shaped and suited to rigidly maintain radial pins of peculiar conformation, without riveting or other fastenings.

A further feature is in the provision of pins, stamped from sheet steel, each having a substantially T-shaped base, a shank fitting the perforations in the layers of the lag, and an attenuated stem for operative purposes extending through the perforations in the outermost lag.

Another purpose is to produce a lag and pin, both of which are essentially simple, highly effective and capable of inexpensive construction in quantity production.

These beneficial objects are attained by the novel design, construction and combination of parts hereinafter described and shown in the annexed drawing, constituting a component of this disclosure, and in which:

Figure 1 is a fragmentary end elevational view of an embodiment of the invention.

Figure 2 is a fragmentary perspective view of a layered lag, as perforated, certain of the perforations showing pins set therein.

Figure 3 is a transverse sectional view taken on line 33 of Figure 2. 2

Figure 4 is a perspective detail view of one form of a lag pin.

Figure 5 is a similar view of an alternative form of pin point.

Referring in greater detail to the drawing, the numeral I5 designates the rim of one of the cylinder end supports, on which are slats or staves l6, usually wooden, held by bolts H in such manner as to provide a true, unbroken cylindrical surface over which is preferably secured a sheet metal covering or sheath I8.

Disposed thereon is the innermost layer 20 of lags curved concavely in conformity with the cylinder circumference and provided with rows of elongated, substantially rectangular, transverse openings 2|, although it is to be understood other shapes may be employed if preferred.

The second layer of lags 22 are similarly bent and provided with rows of like openings 23. It is to be noted that the openings 23 are offset laterally from the openings 2|, in such manner that when the openings are in registration, the side edges of the lags 20 and 22 extend one past the other, constituting tongue-and-groove side connections with the next adjacent series.

These layers are, in turn, superposed by a similarly offset layer 24 having perforations 25 but of lesser length than the openings 21 and 23 and arranged to register therewith, while their side edges are offset in the manner indicated; if required additional layers may be supplied.

Near the ends of each layer are round openings 28, arranged in paired relation, for the reception of staple bolts 30 passing through the proximate edges of the several layers, the slats l6, rims of the supports l5, and strap plates 29 to be clamped thereagainst by nuts 3|.

The pins, generally indicated by the numeral 32, and which are preferably die cut from sheet steel, consist of an elongated T-shaped base or foot 33 disposed below the openings 2| in the innermost lag 20, the width of the cross-bar portions of the pins being equal to the thickness of the lag.

The shanks 34 of the pins are force fits in the openings 2| and 23 of the plates 20 and 22, and extend flush with the outer surface of the plates 22. At the ends of the shanks are stems 35 terminating in points 36, or 36; as shown in Figure 5, which entering the stock initially separate its fibers, the main work being done by the ends or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

Having thus described the invention, what is claimed as new and desired to secure by Letters Patent, is:

1. A picker cylinder lag comprising a plurality of sheet steel laminae transversely curved in conformity with the cylinder and adapted to be secured thereto, each layer having its lateral edges offset one from another in the manner of tenon and mortise side edge relation, said layers having rows of longitudinally disposed elongated rectangular perforations arranged in transverse registration, the perforation in the uppermost layer being shorter than the perforations in the layer therebelow, flat steel picker pins tightly fitted in the mentioned perforations, said pins having widened enlargements at their inner ends disposed below the innermost layer, shanks reaching through the perforations in the other layers, and projecting picker elements extending from said shanks.

2. A picker cylinder lag comprising a. plurality of sheet steel laminae arranged in laterally oifset relation, said laminae having registering punched perforations, the perforations in the outermost of said laminae of lesser size than the perforations in the other laminae, an imperforate backing plate lining for said laminae, pins die cut from sheet steel, having widened bases to seat on said backing plate, shanks force fitting the perforations in the under laminae, narrowed stems extending from said shanks to pass through the perforations in the outermost laminae, and tearing points in the extended ends of said stems.

ROBERT C. REED. LAWRENCE BOOK. 

